Thread rolling head

Abstract

A thread rolling head with at least two profile rollers provided with a forming thread that are rotatably supported in a supporting unit and a feed motion device that will cause the profile roller to clamp and release a cylindrical work piece, wherein each of the profile rollers constitutes a single piece with its mounting bolts, which make it possible for the profile rollers to be rotatably supported in a supporting unit at one end only.

We claim: 
     
       1. A thread rolling head comprising at least two profile rollers having a forming thread and being rotatably supported in a supporting unit, and a feed motion device adapted to bring said profile rollers into engagement with a cylindrical work piece, said support unit having bores for the accommodation of sleeves, said sleeves having an eccentric bore and being adapted to be rotated through a gear device, said profile rollers having a bearing stud integrally formed therewith, said bearing stud being accommodated by said eccentric bore of said sleeve. 
     
     
       2. A thread rolling head in accordance with claim 1, characterized in that each of the profile rollers is formed integrally with a mounting bolt (24), each mounting bolt being received by the eccentric bore of the sleeve, the mounting bolt (24) being held fast in the axial direction by means of a screw fixing. 
     
     
       3. A thread rolling head in accordance with claim 1, characterized in that each of the profile rollers is formed integrally with a mounting bolt (24), each mounting bolt being received by the eccentric bore of the sleeve, the mounting bolt (24) being held fast in the axial direction by a locking device configured and arranged to allow removal and replacement of a profile roller. 
     
     
       4. A thread rolling head in accordance with claim 1, characterized in that an extension pin (48) of the sleeve (20) carries a gearwheel (50) that engages with another gearwheel (52) that is coaxially seated on a coupling comprised of a first coupling component (56) and a second coupling component (58) connected to clamping stub (60) or similar. 
     
     
       5. A thread rolling head comprising at least two profile rollers (26) having a forming thread and being rotatable supported in a supporting unit, and a feed motion device adapted to bring said profile rollers into engagement with a cylindrical work piece, said support unit having bores for the accommodation of sleeves, said sleeves having an eccentric bore and being adapted to be rotated through a gear device, said profile rollers having a bearing stud integrally formed therewith, said bearing stud being accommodated by said eccentric bore of said sleeve, each of the profile rollers is formed integrally with a mounting bolt (24), each mounting bolt being received by the eccentric bore of the sleeve, the mounting bolt (24) being held fast in the axial direction by a locking device configured and arranged to allow removal and replacement of a profile roller, the profile roller (26) and the mounting bolt (24) are provided with an axial boring (34) that extends for the entire length of the bolt and accommodates a lock pin (36) with a conical locking surface or throat (38) that, in its turn, acts on a locking element (42) seated in a radial boring (40) of the mounting bolt (24) and capable of moving in a radial direction and, further, in that the boring in which the mounting bolt is accommodated is provided with an annular groove (42a) in which the locking element (42) is free to move when the profile roller (26) rotates.